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    Controlled power supply for key telephone system
    1.
    发明授权
    Controlled power supply for key telephone system 失效
    关键电话系统的控制电源

    公开(公告)号：US4763348A

    公开(公告)日：1988-08-09

    申请号：US853225

    申请日：1986-04-17

    申请人： Yoichiro Sano ,  Teruo Matsufuji ,  Akira Sato

    发明人： Yoichiro Sano ,  Teruo Matsufuji ,  Akira Sato

    IPC分类号： H04Q3/58 ,  H04M9/00 ,  H04M19/08 ,  H04M1/64 ,  H04M19/00

    CPC分类号： H04M9/003 ,  H04M19/08 ,  H04M9/002

    摘要： A key telephone system provided with a power supply for supplying power to a specified key telephone set at all times and a controlled power supply capable of turning ON and OFF the power supply to controlled key telephone sets other than the specified key telephone set. The controlled power supply has provision for being automatically turned ON and OFF in accordance with a predetermined schedule or turned ON and OFF under control of the specified set. The power supply is turned ON upon receiving an incoming call or turned OFF upon ON - hooking of the key telephone set after a talking operation with a calling party or automatically turned ON and OFF in response to a specified dial signal incoming after automatically answering the incoming call. The key telephone system can have provision for individually controlling the power supply to each controlled key telephone set.

    摘要翻译： 一种电话系统，其具有用于一直向指定的钥匙电话机供电的电源，以及能够将电源接通和断开的受控电源供给除指定的钥匙电话机之外的受控钥匙电话机。 控制电源具有根据预定时间表自动接通和断开的设置，或者在指定的集合的控制下被接通和断开。 在接通来电或接通电源后，电源接通，或者在与主叫方进行通话操作之后将钥匙电话机挂断，或者在自动接听来电后响应指定的拨号信号进入自动打开和关闭 呼叫。 密钥电话系统可以单独控制每个受控密钥电话机的电源。